'Ocean whence sprang the gods, and mother Tethys,'

does he not mean that all things are the offspring, of flux and motion?

THEAETETUS: I think so.

SOCRATES: And who could take up arms against such a great army having
Homer for its general, and not appear ridiculous? (Compare Cratylus.)

THEAETETUS: Who indeed, Socrates?

SOCRATES: Yes, Theaetetus; and there are plenty of other proofs which will
show that motion is the source of what is called being and becoming, and
inactivity of not-being and destruction; for fire and warmth, which are
supposed to be the parent and guardian of all other things, are born of
movement and of friction, which is a kind of motion;--is not this the
origin of fire?

THEAETETUS: It is.

SOCRATES: And the race of animals is generated in the same way?

THEAETETUS: Certainly.

SOCRATES: And is not the bodily habit spoiled by rest and idleness, but
preserved for a long time by motion and exercise?

THEAETETUS: True.

SOCRATES: And what of the mental habit? Is not the soul informed, and